Miniature rose plant named `Poulvert`

ABSTRACT

A miniature class rose plant with yellow flower color and many prickles on the flower stems.

The present invention relates to a new and distinct variety of roseplant of the miniature class which was originated by us by crossing twounnamed seedlings.

The primary objective of this breeding was to produce a new miniaturerose variety that can be potforced and grown from cuttings. Theobjective was substantially achieved along with other desirableimprovements.

Asexual reproduction of this new variety by softwood cuttings, asperformed at Somis, Calif. and Fredensborg, Denmark, shows that theforegoing characteristics and distinctions come true to form and areestablished and transmitted through succeeding propagations.

The accompanying illustration shows typical specimens of the vegetativegrowth and flowers of this new variety in different stages ofdevelopment, depicted in color as nearly true as it is reasonablypossible to make the same in a color illustration of this character.

The following is a detailed description of my new rose cultivar withcolor descriptions using terminology in accordance with The RoyalHorticultural Society (London) Colour Chart, except where oridinarydictionary significance of color is indicated.

Parentage:

Seed parent.--An unnamed seedling.

Pollen parent.--An unnamed seedling.

Classification:

Botanical.--Rosa hybrida.

Commercial.--Miniature.

FLOWER

Observations made from specimens grown in a greenhouse environment atthe premises of Poulsen Roser ApS, Fredensborg, Denmark, in 1990.

Blooming habit: Continuous.

Bud:

Size.--1.5 cm long when the petals start to unfurl.

Form.--Long, pointed ovoid.

Color.--When sepals first divide, bud color is Yellow Group 5C. Whenhalf blown, the upper and lower sides of the petals are Yellow Group 5C.

Sepals.--Color: Green. Surface texture: Covered in fine hairs. There arethree lightly appendaged sepals. There are two unappendaged sepals withsmooth edges.

Receptacle.--Color: Green Group 138B. Shape: Pitcher shaped. Size:Small. Surface: Smooth.

Peduncle.--Length: Long, for a pot rose. Surface: Prickly. Color: Lightgreen. Strength: Stiff, erect.

Bloom:

Size.--Small. Average open size is 4 cm in diameter.

Borne.--Several together, in pyramidal clusters averaging 3 or 4flowers.

Stems.--Medium (average 15 cm long), strong.

Form.--When first open: Cupped. Permanence: Flattens, outer petal edgesslightly curl.

Petalage.--Number of petals under normal conditions: 30 to 40.

Color.--The upper and reverse sides of the petals are Yellow Group 5C.The bases of the petals are Yellow Group 5C. The major color on theupper side is Yellow Group 5C.

Variegations.--None.

Discoloration.--No change in the general tonality at the end of thefirst day or at the of the third day.

Fragrance.--Slight.

Petals:

Texture.--Thin.

Shape.--Round.

Form.--Tips slightly recurved, edges moderately quilled.

Arrangement.--Informal, with few petaloids in the center.

Persistence.--Drop off cleanly.

Lastingness.--On the plant: Fair (7 to 10 days). As a cut flower: Fair(7 days).

Reproductive parts:

Anthers.--Size: Large. Quantity: Many (for a miniature rose). Color:White, yellow. Arrangement: Regular around styles.

Filaments.--Color: Yellow.

Pollen.--Color; Gold Yellow.

Styles.--Color: White to light yellow.

Stigmas.--Color: White.

Form: Bush.

Growth: Dwarf, upright.

Foliage: Number of leaflets on normal mid-stem leaves: 5.

Size.--Small.

Quantity.--Normal.

Color.--New foliage: RHS Green Group 139C Old foliage; Green Group 137B.

Leaflets:

Shape.--Oval pointed.

Texture.--Upper side: Smooth.

Edge.--Serrated.

Serration.--Single, small.

Petiole rachis.--Color: Green.

Petiole underside.--Smooth.

Stipules.--Medium, serrated.

Disease resistance.--Resistant to mildew under normal growing conditionsin Denmark and at Somis, Calif.

Wood:

New wood.--Color: Light green. Bark: Smooth.

Old wood.--Color: Green. Bark: Smooth.

Prickles:

Quantity--On main canes from base: Ordinary. On laterals from maincanes: Few.

Form.--Straight.

Color when young.--Red, translucent.

Small Prickles:

Quantity.--On main stalks: Few. On peduncle: Many.

Color--Light, yellowish green, translucent.

I claim:
 1. A new and distinct variety of rose plant of the miniatueclass, substantially as herein shown and described, characterizedparticularly as to novelty by the unique combinatin of its yellow flowercolor and many prickles on the flower stems.